Before buying just any flywheel for a 16hp vanguard eng,get mod/type numbers off eng & goto link below & look up your eng for correct flywheel pn & also check if aluminum ring gear avail seperate,if it is consider buying a new gear and replace or take flywheel to a local machine shop to have replaced if gear not bolted to flywheel.

Problem being the vanguard twins used seven different alt stators & three flywheels with different size magnets,depending on alt stator on eng & size of magnets in flywheel you may have charging issues if stator/flywheel magnet size not matched.
briggs

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